Orchideous is the incantation for a spell which conjures a bouquet of flowers out of the end of a wand.
References from the canon
- Mr. Ollivander used this spell to test Fleur's wand at the Weighing of the Wands (GF18).
- Tom Riddle "produced a bunch of roses from nowhere" for Hepzibah Smith, which was either sleight of hand or a non-verbal spell, possibly a spell similar to Orchideous (HBP20)
Jinxes and hexes
"Orchideae" L. name for the orchid plant family
Probably a Charm, but used as a Jinx with different spelling ("Orchideus") to turn creatures into flowers on Goblet of Fire video game.